PARASITIC Won MS LKIPEK AND ATKINSON. 3:> 



ife. Most of the specimens appear comma-shaped, owing t<> the ventral 

 bending of the anterior portion of the body. The worms taper considerably in front, 

 having tlieir greatesl width at the level of the yolk-elands, where the body becomes 

 thick and almost cylindrical. The posterior end is very bluntly rounded. The 

 excretory pore lies at the base of a small dimple. There is no abdomen, nor does 

 the skin appeal- to be striated, although on the ventral aspeet irregular rugae are seen, 

 apparently attributable to the bending of the specimen. The oral sucker (I'l. Ill, 

 li'j. is. n) is about half the si/ce of the ventral sucker (li). The suckers varv considerably 

 in shape and in the thickness of the muscular wall in different specimens. This is due to 

 \arving amounts of contraction. A characteristic feature of the oral aperture is a 

 tleshv lip extending around the dorsal but absent from the ventral rim. 



The pharvnx is small and globular. The main gut-branches (;/) are greatly dilated. 

 Thev extend to the posterior end of the body, where they are almost contiguous. 



The yolk-glands (//. //') consist of two half-moon-shaped solid masses lying in 

 apposition, one anterior to the other. The ovary (r.) is smooth and oval, with the 

 posterior aspect somewhat indented bv the yolk-gland. The testes (t, t') are compact 

 rounded bodies lying slightlv diagonally to one another, immediately in front of the 

 ovary. The eggs as seen within the uterus (nt) measure 0'04 mm. by 0'02 mm., and 

 are brownish in colour. 



LEPOCREADIINAE. 



/A'j'ni/i it-it, Odhner, 1905. 

 15. Li'/xH/iH'ii i/itri'iii-i/!, Leip. and Atk. (PI. Ill, tig. 20.) 



Li'fMiilnrii i/tii'i'iti-il!, Leiper and Atkinson, Pm: Zi>L S<n'., 1914, p. 224. 



Flat tlrshy forms 3 nun. liy 0'9 mm. Colour brownish, due to numerous yolk-glands. Skin covered 

 with delicate spines. Ventral sucker O27 mm., oral sucker O37 mm. Stout pyriform pharynx, 0'2 mm. 

 l-^u's few but large. Testes tandem. Gut-branches wide and extending to the posterior end of the 



I M ly. 



Hunt. Two specimens from the intestine of Trematomus l><'ritn<-<-/iii. 



I'linixitt'. Flat fleshy forms, 3 mm. by O'i) mm., of a brownish colour, apparently 

 due to the large and numerous yolk-glands, which extend from the level of the 

 bifurcation of the gut to the posterior end of the body, and inwards also to unite across 

 the body. Delicate spines occur on the skin. The ventral sucker (PI. Ill, fig. 20, />), 

 ()"_'7 mm. in diameter, is slightlv smaller than the oral sucker (<i), and lies at the 

 junction of the anterior and middle third of the body. The oral sucker, 0'37 mm. in 

 diameter, opens subterminallv. There is a prepharynx and a stoutly developed pyriform 

 muscular pharvnx. 0"_' mm., succeeded by a slender oesophagus. The two gut-branches 

 (//) are of wide lumen and reach to within O'l mm. of the excretory opening. The 

 genital i iriliee (<///) lies imiiiediatelv in front of the ventral sucker and is nnusuallv 

 obvious. The cirrus is short and flesh v. The globular testes (/. /') lie tandem, and 

 immediately in trout of them, and slighrlv to one side of the middle line, is a lame 



It 



